A huge real ale festival has opened in London with new research claiming that beer can help people lose weight -- when drunk in moderation. The UK's Campaign for Real Ale says a third of people wrongly believe that beer has more calories than other alcoholic drinks.

A huge real ale festival has opened in London with new research claiming that beer can help people lose weight -- when drunk in moderation. The UK's Campaign for Real Ale says a third of people wrongly believe that beer has more calories than other alcoholic drinks.